Jukely - Go to hundreds of concerts for one monthly fee 💃
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Sporteventus for iOS - The worldwide search engine for sporting events and tickets
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
TicketHarbor - The safer Craigslist for P2P ticket exchanges
Prometheus - An open-source systems monitoring and alerting toolkit.